- Bascom, Florence; Wherry, Edgar Theodore; Stose, George Willis; Jonas, A. I., 1931, Geology and mineral resources of the Quakertown-Doylestown district, Pennsylvania and New Jersey: U.S. Govt. Print. Off., Bulletin 828, 62 p.,
- Berry, E. W., 1931, A flora of Green River age in the Wind River basin of Wyoming: Professional Paper 165-B, p. 55-81,
- Bradley, W. H., 1931, Origin and microfossils of the oil shale of the Green River formation of Colorado and Utah: Professional Paper 168, 58 p.,
- Burchard, E. F., 1931, Contributions to economic geology, 1930: Part I. Metals and nonmetals except fuels. Iron ore on Canyon Creek, Fort Apache Indian Reservation, Arizona: Bulletin 821-C, 78 p.,
- Cushing, Henry Platt; Leverett, Frank; Van Horn, Frank Robertson., 1931, Geology and mineral resources of the Cleveland district, Ohio: U.S. Govt. Print. Off., Bulletin 818, 138 p.,
- Geological Survey (U.S.), 1931, Shorter contributions to general geology, 1930: Professional Paper 165, iv, 180 p., [40] p. of plates. : ill. (some col., 3 fold-outs), maps (some col., 4 fold-outs) ; 30 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1926 : Part 12, North Pacific drainage basins ; B. Snake River basin: U.S. Govt. Print. Off., Water Supply Paper 633, vi, 263 p. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1927, Part I, North Atlantic slope basins: U.S. Govt. Print. Off., Water Supply Paper 641, vii, 188 p. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1927, Part II, South Atlantic slope and eastern Gulf of Mexico basins: U.S. Govt. Print. Off., Water Supply Paper 642, v, 103 p. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1927, Part III, Ohio River basin: U.S. G.P.O., Water Supply Paper 643, vii, 216 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1927, Part V, Hudson Bay and upper Mississippi River basin: U.S. Govt. Print. Off., Water Supply Paper 645, v, 115 p. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1927 : Part 11. Pacific slope basins in California: U.S. G.P.O., Water Supply Paper 651, ix, 299 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1927 : Part 12, North Pacific drainage basins ; A. Pacific drainage basins in Washington and upper Columbia River basin: U.S. Govt. Print. Off., Water Supply Paper 652, v, 111 p. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1927 : Part 12, North Pacific drainage basins ; B. Snake River basin: U.S. Govt. Print. Off., Water Supply Paper 653, vi, 230 p. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1927 : Part 12, North Pacific drainage basins ; C. Pacific slope basins in Oregon and lower Columbia River basin: U.S. Govt. Print. Off., Water Supply Paper 654, vi, 142 p. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1928, Part I, North Atlantic slope basins: U.S. Govt. Print. Off., Water Supply Paper 661, vii, 235 p. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1928, Part III, Ohio River basin: U.S. Govt. Print. Off., Water Supply Paper 663, viii, 245 p. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1928, Part IV, St. Lawrence River basin: U.S. Govt. Print. Off., Water Supply Paper 664, v, 119 p. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1928, Part V, Hudson Bay and upper Mississippi River basin: U.S. Govt. Print. Off., Water Supply Paper 665, v, 109 p. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1928, Part VI, Missouri River basin: U.S. Govt. Print. Off., Water Supply Paper 666, vii, 207 p. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1928, Part VII, Lower Mississippi River basin: U.S. Govt. Print. Off., Water Supply Paper 667, iv, 80 p. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1928, Part VIII, Western Gulf of Mexico basins: U.S. Govt. Print. Off., Water Supply Paper 668, v, 123 p. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1928, Part IX, Colorado River basin: U.S. Govt. Print. Off., Water Supply Paper 669, iv, 96 p. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1928 : Part 10, The Great Basin: U.S. Govt. Print. Off., Water Supply Paper 670, v, 95 p. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1928 : Part XI. Pacific slope basins in California: U.S. G.P.O., Water Supply Paper 671, ix, 304 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1928 : Part 12, North Pacific drainage basins ; A. Pacific drainage basins in Washington and upper Columbia River basin: U.S. Govt. Print. Off., Water Supply Paper 672, vi, 138 p. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1928 : Part 12, North Pacific drainage basins ; B. Snake River basin: U.S. Govt. Print. Off., Water Supply Paper 673, vi, 172 p. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1928 : Part XII. North Pacific slope drainage basins : C. Pacific slope basins in Oregon and Lower Columbia River Basin: U.S. G.P.O., Water Supply Paper 674, vi, 155 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1929, Part IV, St. Lawrence River basin: U.S. Govt. Print. Off., Water Supply Paper 684, v, 123 p. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1929, Part VII, Lower Mississippi River basin: U.S. Govt. Print. Off., Water Supply Paper 687, iv, 88 p. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1929, Part IX, Colorado River basin: U.S. Govt. Print. Off., Water Supply Paper 689, v, 105 p. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1929 : Part XI. Pacific slope basins in California: U.S. G.P.O., Water Supply Paper 691, ix, 294 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1929 : Part 12. North Pacific slope drainage basins : B. Snake River basin: U.S. G.P.O., Water Supply Paper 693, vi, 183 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1931, Surface water supply of the United States, 1930 : Part 10, The Great Basin: U.S. Govt. Print. Off., Water Supply Paper 705, v, 92 p. ;23 cm.,
- Gregory, Herbert Ernest; Moore, Raymond Cecil, 1931, The Kaiparowits Region: A Geographic and Geologic Reconnaissance of Parts of Utah and Arizona: Geological Survey (U.S.) Professional Paper 164, vii, 161 p. incl. tables, diagrs. 31 pl. (incl. maps (part fold.) fold diagrs.) 29 cm.,
- Grover, Nathan C., 1931, Contributions to the hydrology of the United States, 1930: U.S. Govt. Print. Off., Water Supply Paper 637, iv, 220 p. :ill., maps (1 map in pocket) ;23 cm.,
- Hewett, D. F., 1931, Geology and ore deposits of the Goodsprings quadrangle, Nevada: Professional Paper 162, 172 p.,
- Hoots, H. W., 1931, Geology of the eastern part of the Santa Monica Mountains, Los Angeles County, California: Professional Paper 165-C, p. 83-134,
- Jones, Benjamin E.; Stearns, Harold T., 1931, Water-power resources of the McKenzie River and its tributaries, Oregon: U.S. Govt. Print. Off., Water Supply Paper 637-C, p. 91-124, [5] leaves of plates (some fold.) :ill. ;23 cm.,
- Keith, Arthur; Sterrett, Douglass Bovard, 1931, Gaffney-Kings Mountain folio, South Carolina-North Carolina: Folios of the Geologic Atlas 222, 1 atlas (13 p., [9] leaves of plates) : ill., 8 col. maps ; 55 x 47 cm.,
- Knappen, R. S.; Moulton, G. F., 1931, Contributions to economic geology (short papers and preliminary reports), 1930, Part II, Mineral fuel. Geology and mineral resources of parts of Carbon, Big Horn, Yellowstone and Stillwater counties, Montana: Bulletin 822-A, 1-70 p.,
- Loughlin, Gerald Francis; Burchard, E. F., 1931, Contributions to economic geology (short papers and preliminary reports, 1930 : Part I. - Metals and nonmetals except fuels: U.S. G.P.O., Bulletin 821, 78 p. :ill., xviii pl. (incl. some fold. maps) ;24 cm.,
- Lovering, T. S., 1931, Contributions to economic geology (short papers and preliminary reports), 1930, Part II, Mineral fuel. The Granby anticline, Grand County, Colorado: Bulletin 822-B, 71-76 p.,
- McGlashan, Harry Deyoe, 1931, Surface water supply of minor San Francisco Bay, Northern Pacific, and Great Basins in California, 1895-1927: U.S. Geological Survey, Water Supply Paper 637-A, iv, 68 p. :ill., maps ;23 cm.,
- Mertie, John Beaver, Jr., 1931, A geologic reconnaissance of the Dennison Fork district, Alaska: U.S. Govt. Print. Off., Bulletin 827, 44 p. :incl. maps, tables, 7 pl. (part fold; incl. 2 maps (in pocket)) ;23 cm.,
- Miser, Hugh D., 1931, Contributions to economic geology (short papers and preliminary reports), 1930 : Part II. - Mineral fuels: U.S. G.P.O., Bulletin 822, 100 p. :ill., ix pl. (incl. some fold. maps) ;24 cm.,
- Nickles, John M., 1931, Bibliography of North American geology, 1919-1928: U.S. Govt. Print. Off., Bulletin 823, 1005 p.,
- Nickles, John M., 1931, Bibliography of North American geology, 1929 and 1930: U.S. G.P.O., Bulletin 834, 280 p. ;24 cm.,
- Noble, Levi Fatzinger, 1931, Nitrate deposits in southeastern California, with notes on deposits in southeastern Arizona and southwestern New Mexico: U.S. Govt. Print. Office, Bulletin 820, 108 p. ill., maps ;25 cm.,
- Reeves, Frank, 1931, Geology of the Big Snowy Mountains, Montana: Professional Paper 165-D, p. 135-149,
- Reeves, Frank; Ross, C. P., 1931, Contributions to economic geology (short papers and preliminary reports), 1930, Part I, Metals and nonmetals except fuels. A geologic study of the Madden Dam project, Alhajuela, Canal Zone: Bulletin 821-B, 11-49 p.,
- Renick, B. Coleman, 1931, Geology and ground-water resources of western Sandoval County, New Mexico: U.S. Govt. Print. Off., Water Supply Paper 620, vi, 117 p. :incl. map, tables, diagrs. 10 pl. (part fold., incl. map (in pocket) fold. tab. ;23 cm.,
- Ross, C. P., 1931, Contributions to economic geology (short papers and preliminary reports), 1930, Part I, Metals and nonmetals except fuels. A graphic history of metal mining in Idaho: Bulletin 821-A, 1-9 p.,
- Ross, C. S.; Kerr, P. F., 1931, The kaolin minerals: Professional Paper 165-E, p. 151-176,
- Rubey, W. W., 1931, Lithologic studies of fine-grained Upper Cretaceous sedimentary rocks of the Black Hills region: Professional Paper 165-A, p. 1-54,
- Short, Maxwell Naylor, 1931, Microscopic determination of the ore minerals: U.S. Govt. Print. Off., Bulletin 825, 204 p. :incl. illus., tables. 11 pl. (part col.) ;23 cm.,
- Spieker, E. M., 1931, Contributions to economic geology (short papers and preliminary reports), 1930, Part II, Mineral fuel. Bituminous sandstone near Vernal, Utah: Bulletin 822-C, 100 p.,
- Spieker, Edmund M., 1931, The Wasatch Plateau coal field, Utah: U.S. Govt. Print. Off., Bulletin 819, 210 p.,
- Stearns, Harold T., 1931, Geology and water resources of the middle Deschutes River Basin, Oregon: U.S. Government Printing Office, Water Supply Paper 637-D, p. 125-220, [4] leaves of plates (2 folded) :ill., maps (2 col.) ;23 cm.,
- Thorn, W. T., Jr.; Spieker, E. M.; Stabler, Herman, 1931, The significance of geologic conditions in Naval Petroleum Reserve No. 3, Wyoming, with a section on the waters of the Salt Creek-Teapot Dome uplift: Professional Paper 163, 64 p.,
- Turner, S. F., 1931, Report on water supply for the proposed Southwestern Reformatory at El Reno, Oklahoma: Open-File Report 31-1, 20 p.,
- White, Walter N., 1931, Preliminary report on the ground-water supply of Mimbres Valley, New Mexico: U.S. G.P.O., Water Supply Paper 637-B, ii, p. 69-90, 1 folded leaf of plate :map ;23 cm.,
- Wilmarth, Mary Grace, 1931, Names and definitions of the geologic units of California: U.S. Govt. Print. Off., Bulletin 826, 97 p.,
